Measuring device



May 15, 1928. 1,669,519

' F. W. HILD MEASURING DEVI CE OIfiginal Filed Jan. 25. 1923' 2 Sheets-Sheet 1 INVENTOR Freden'c W hi/af ATTO JEY May 15, 1928. 1,669,519-

F. W. HILD MEASURING DEVICE Original Filed Jan. 25. 1923 2 Sheets$heet 2 INVEN WITNES ES:

Q flea e08 M BY 2L 7 ATIORNEY Patented May 15, 1928.

UNITED STATES PATENT OFFICE.

FREDERIC W. HILD, 012 LOS ANGELES, CALIFORNIA.

MEASURING DEVICE.

Original application filed January 25, 1923, Serial No. 614,939. Divided and this application filed Iay 15,

- 1924. Serial No. 713,440. I

My invention relates to measuring devices and particularly to measuring devices that are adapted for use in connection with control systems for oil-well, and other, earth drilling, and similar operations, such as shown and disclosed in my co-pending application, Serial No. 614.939, filed Jan. 25, 1923, of which the present application is a division.

a device of the above indicated character that shall indicate the pressures on the drill bit of a drilling mechanism for all drilling conditions and distances of drilling opera- 5 tion.

Another object of my invention is to provide a measuring device that shall comprise a combination of indicating, maximum-de-o mand and pressure elements.

Another object of my invention is to provide a measuring device, employing an indicating member and an actuating element therefor, that shall relieve the actuating element of the resistance ordinarily imposed thereon by the indicatingmember.

A further object of my invention is to provide a measuring device that shall indicate the difl'erence between the instantaneous and the maximum values of the quantity to be measured.

Figure 1 of the accompanying drawings, is a plan view of a measuring device constructed in accordance with my invention,

Fig. 2 is a view, partially in elevation and partially in section, of the device shown in Fig. 3 is a diagrammatic view of a control or regulating system that is adapted to be operated in accordance with the action of the apparatus illustrated in Fig. 1, and

Fig. 4. is a semi-diagrammatic view of an earth-drilling apparatus with which the measuring device of my invention is adapted to co-operate.

Referring to Figs. 1 and 2, the device comprises, in general, a casing 1, a supporting bracket 2 thereon, a meter 3, an auxiliary motive device 4, a stationary dial 5, a maximum-demand indicating element 9r dial 6 a an el ment dial 7;

One object of my invention is to provide position by a spring 19. The stationary dial member 5 is preferably of annular shape and secured in position below a transparent cover member 20, that is secured to the casing 1. The maximum-demand element 6, which may be semi-circular in form, is rigidly secured to a sleeve 22 that extends upwardly through the cover. member 20,

and the bracket member 2 by which it is supported, and is provided with a knob or handle member 23, whereby the element 6 may be adjustably positioned.

The dial or element 7, which is preferably of circular shape, is disposed below the movable element 6, substantially in the plane of the stationary dial 5. A pin or shaft 24 is rigidly secured to the element 7 and extends upwardly, through the sleeve 22 to a knob or handle member 26 that is disposed above the handle member 23. A friction ring or sleeve 27 is provided between the sleeve 22 and the shaft'24 to permit the elements 6 and 7 to be adjustably moved relatively and to move together-through the medium of the friction sleeve 27.

The outer end 29, of the indicating arm. 18, projects upwardly through an annular space between the element 7 and the dial 5, and is provided with an index. or target member 30, having points which co-operate, respectively, with the stationary dial 5 and with a scale 21 on the element The indicating arm 18 is also provided, adjacent to the index 30, with a flexible contact member 32 for co-operative engagement with a contact member 33, disposed on the lower side of the maximum-demand element 6, and a contact member 34 mounted upon the upper side of the element 7. The maximum-demand element 6 is further provided 199 with a contact member 13% for engagement with a stationary contact member 36 in the mere position of the element 6. V

The motive dew cc '1 compris s a base incur her 37 for supporting a movable hralre arm that is biased toward the braking position, by means oil 'a suit hl-e spring 40, as, :s own in ig. T2. The lee arm 391's provided, at one end, with a yieldable hralre shoe 231 or engagement with an escapemenzt wheel 42 of a cloclm r-k mechanism 43.. A pinion 44:, that is adapted to actuated by the clock mechanism 43., through a shaft 4?), operatively engages the demand element *6 to turn the latter As shown in Fi 3, the wi lugs 19 and ill of the meter 3 are adapted to l rrmnected to an induction motor 47, the =.l ring torque of which it is dcsi red to control irough'rolh age and current transformers 4'8 49", respectively.

In so far as this application is concerned,

the index 30 is operated by the meter 3 to indicate on the stationary dial 5, the instanta neous values of the load on the motor 47 to which the meter 3 is connected, and the maximum element '7 is provided with a pointer element 46, also for co-operation with the stationary dial 5, for indicating the maximum values of the load on the mot-or 47, as

' in ausual maximum-demand meter.

However, the index 30 further co-operates with the pointer 46 to indicate, on the movable scale 21 on the element- 7, the difierence between the instantaneous and maximum values of the motor load, as indicated by the index 30 and thepointcr 46, respectively.

Referring to Figs. 3 and l, the motor 47 is connected to another induction motor 48, through a. combined difi'erential gear and winding-drum mechanism 19, the motor 48 being adapted to operate a rotary drill 50, through .a bevel pinion 51, a rotary table or bevel gear wheel 52 and a square or fluted portion 53 of the drill'5O which is longitudinally slidable in the table 52.

The bit 50 is suspended from a crown or block pulley 54 by a rope or cable 55 which is wound on a drum mounted on the planetary element of the difi'ercntial device 49.

The motors 47 and 48 are connected, through an induction regulator 56 and a suitable auto starter 57, or the like, to conductors 58 of a three-phase alternating-current supply line.

The regulator 56 comprises a stationary primary winding 59 of any suitable type and a plurality of rotatable secondary windings 60 and 61 that are, respectively, connected in circuit with the primary windings of the motors 48 and 47. The secondary members (30 and 61 may be driven through the agency of a common shaft 62that is suitably associated with a pilot motor63 which is mountiralce coil 38 and a" mourn ed upon the top of the induction regulator 55 .7 r :(l tor e i he pilot ill tor K525 throu h the agei cv of a rum switch 4 and an orerload-norti tit? emhodydng an operating coil l). an orcrload :cii llll;lll

crc .se a.

sou off one prt' ahly :a three-wine direr orient on is proterrupter 68 and a Ito-current circuit interrupter v As fully exluined in my err-pending application, Serial No. til-4,9410, filed January 1923, for a method of earth drilling, the motor 48 directly drives the rotary table .52 for the drill 50, while the motor 47 performs a regulating function with respect to variations of pressure at the drill point and is always energized proportionately to the cflective weight of the drilling mechanism proper, i, e., the total weight of the suspended drilling device minus the contact pressure. As the drill pipe lengthens during the drilling operation, or as the weight; increases by reason of the unwinding of the drill cable from the drum, the maximum demand segmentwill be automatically advanced, by reason of the action of the clock-work mechanism 4, whenever the contact;- mcmber 34 of the pointer arm 18 and the contact member 38 of the movable segment 6 come into onagcinent.

The movable elements 6 and 7 are initially set, by the handles 23 and 26, respectively, to the zero position on the dial 5 in' which position the contact member 34 engages the contact member 35 and the contact, member 32 engages the contact member 33, The index 30 and the pointer 46 are also in register at the zeroposition on the dial 5. lVhen the circuits are energized, engagement of the contact members 34 and 32 closes a circuit to operate the drum switch in one direction to condition the circuit system for an operation by engagement of the Contact members 32 and 34, as hereinafter set forth.

Also, since the contact members 2-32 and 33 are in engagement, in the zero position of the elements, above described, energization of the circuits causes the coil 38 to attract the arm 39 against the action of the spring 40. This operation releases the brake age app ed to one shoe 31 from the 'escapement wheel 42 and permits the pinion 44 to turn the maximumdemand element 6 which will continue to be thus turned so long as the contact members 32 and 33 are engaged.

The contact members 32 and 33 will remain in engagement so long as the index 30 is actuated positively, or in the clockwise direction, as viewed in Fig. l, by the meter 3. Thus, the meter 3 is relieved of the duty of moving the element 6. When the maximum value of the quantity being measured has been reached or the index 30 is reversed in its direction of movement, the contact members 32 and 33 are separated. This operation de-energizes the coil 38 and permits the spring 40 to return the shoe 31 to engagement with the escapement wheel 42, to thereby stop movement of the maximum element 6.

During the above described ,operation, the contact member 34 moves with the element 7, which is driven by the element 6 through the friction sleeve 27, to a new actual posit-ion, but in the same position relative to the contact member 33, the dis tance between the contact members 33' and 34 representing the torque range over which it is desired to operate the motor 47 to which the meter 3 is connected.

Since the motors 47 and 48 are energized, respectively in accordance with the effective weight of the drilling device and the rota-,

tive pressure on the bit 50,and areconnected through the differential gear device 49, when the pressure on the bit 50 increases, the gear of the differential device next to the motor 48 tends to decrease in rotative speed with the motor 48, consequently, the planetary element and the drum attached thereto are actuated to exert a lifting effect on the bit 50. This action increases the effective weight of the drilling device on the motor 47 because the contact pressure of the bit with the earth is decreased. Consequently, more energy is demanded by the motor 47.

4 Such demand periods may occur at intervals, depending upon the natures of the different strata of earth encountered by the bit 50, and consequently a new position of limit, determined by the adjusted distance between the contact members 34 and 33, the

conditions under which the motor is being operated,

By my invention, the meter 3 is relieved of the resist-ance ordinarily oflered thereto by the maximum indicating member or pointer, and is thereby rendered more sensitiveand accurate. A compact, self-con tained'structure is provided which gives a wide variety of data, such as the instantaneous value of the quantity being measv ured, the maximum value thereof and the diiference between the instantaneous and maximum values.

While I have shown and described a particular form of my invention, changes may be effected therein without departing from the spirit and scope thereof, as set fort-h in the appended claims.

I claim as my invention-z I 1. In a demand meter, the combination with a scale member, a meter element, an indicating member actuated by said element and a member co-operating with said scale member for indicating maximum indications of said first indicating member, of a clock-work mechanism controlled by the first'indicating member to actuate the maximum indicating member.

2. An electrical measuring device compris ing a scale member, and a co-operating automatically relatively movable indicating element therefor including a scale and a pointer that are adjustable relative to each other and movable in concert relative to said firstscale member.

3. An electrical measuring device comprising a scale member, a co-operating automatically relatively movable indicating element therefor including a scale and a pointer that are adjustable relative to each other and movable in concert relative to said first scale member, and an index member, automatically relatively movable with respect to both said scales and co operating therewith.

4. An electrical measuring device comprising a stationary scale member of substantially ring shape, a co-operatin automatically relatively movable indicating element therefor including an annular scale portion concentric with said first scale member and a" pointer adjustable relative to said second scale and movable inconcert therewith, and

Cal

an index member disposed between said scales in automatically relatively movable co-operation .therewith.

5. An electrical measuring device comprising a stationary scale member of substantially rin shape, a co-operating automati- -ally relatively movable indicating element therefor including a discoidal scale portion. disposed in concentric flush relation to said first scale member and a pointer above said scales adjustable relative to said second scale and movable in concert therewith, and an automatically movable indicating elementincluding a portion below, a portion projecting upwardly between and an index above said scales co-operating therewith.

6. A measuring device comprising an automatically movable indicating member, a second member adapted to move with said indicating member under predetermined conditions, a third member, and means for driving said third member by said second member and manually adjusting the relative positions of the second and third members.

7. A measuring device comprising an automatically movable indicating-member, a second member adapted to be driven with said indicating member, a third member, and means for frictionally driving said third member b said second member and permitting relative movement therebetween.

8. A measuring devicecomprising an automatically movable indicating member, a second member adapted to be driven with said indicating member, a third member movable relative to the second member, and

means for maintaining the third member in a predetermined position relative to second member.

9. A measuring device comprising an indicating member, a second member adapted to be driven with said indicating member upon making an electrical contact therewith, a third member, and means whereby said third member may be frictionally driven by said second member and also adapted to make electrical contact with said indicating member. l

10. A measuring device comprising an indicating member, a second movable member adapted to make electrical contact with said indicating member, means for driving said movable member along with said indicating. member during such contact period, and a third movable member normally adapted to be driven by said second movable member.

11. A measuring device comprising an indicating member, a wattmeter element for actuating said member, a maximum demand member adapted to make intermittent electrical contact with said indicating member, a clockwork mechanism for driving said said maximum demand member along with said indicating member during such contact period, and a member frictionally driven by said maximum-demand member and also adapted to make intermittent electrical contact with said indicating member.

12. A measuring device comprising an indicating member, a second member adapted to be driven with said indicating member upon making an electrical contact therewith, a third member frictionally driven by said second member and also adapted to make electrical contact with said indicating member, and means for manually adjusting the relative positions of said second and third members to determine the distance between the positions of contact.

13. A measuring device comprising an indicating member, a wattmeter element for actuating said member, a maximum demand member adapted to make intermittent electrical contact with said indicating member, a clockwork mechanism for driving said maximum demand member along with said indicating member during such contact period, a member frictionally driven by said maximum demand member, and also adapted to make intermittent electrical contact with said indicating member, and means for manually adjusting the relative positions of said maximum demand and frictionallydriven members to determine the distance between the limiting positions of contact by said indicating member.

14. A measuring device comprising an indicating member, a Wattmeter element for actuating said member, a maximum demand member adapted to make intermittent electrical contact with said indicating member, a clockwork mechanism for driving said maximum demand member along with said indicating member during such contact period, a member frictionally driven by said maximum demand member and also adapted to make intermittent electrical contact with said indicating member, means for manually adjusting therelative positions of said maximum demand and frictionally-driven members to determine the distance between the limiting positions of contact by said lndieating member, and means for making another electrical contact when'sald maximum demand member occupies its zero position.

15. In a-self-contained meter-unit structure, the combination with a scale member, a meter element and an indicating element co-operating with said scale member and movable in accordance with movement of the meter element, of means for causing sa1d movement of the indicating element independently of the met-er element comprising actuating means for the indicating element, co-operating contacts operatively associated with the meter and indicating elements, and means responsive to the closing or opening of said contacts for rendering said actuating means electrically controlled by the first means operative or inoperative. indicating member to actuate the maximum- 10 16. In a demand meter, the combination indicating member. with a scale member, a meter element, an In testimony whereof, I have hereunto 5 indicating member actuated by said element subscribed my name this thirtieth day of and a member co-opcrating with said scale April, 1924. member for indicating maximum indications of said first indicating member, of FREDERIC V. HILD. 

